3984949 has 2 divisors, whose sum is σ = 3984950. Its totient is φ = 3984948.

The previous prime is 3984943. The next prime is 3984971. The reversal of 3984949 is 9494893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2528100 + 1456849 = 1590^2 + 1207^2 .

It is a cyclic number.

It is not a de Polignac number, because 3984949 - 2³ = 3984941 is a prime.

It is a Chen prime.

3984949 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3984899 and 3984908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3984941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1992474 + 1992475.

It is an arithmetic number, because the mean of its divisors is an integer number (1992475).

Almost surely, 2^3984949 is an apocalyptic number.

It is an amenable number.

3984949 is a deficient number, since it is larger than the sum of its proper divisors (1).

3984949 is an equidigital number, since it uses as much as digits as its factorization.

3984949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 46.

The square root of 3984949 is about 1996.2337037531. The cubic root of 3984949 is about 158.5407551756.

The spelling of 3984949 in words is "three million, nine hundred eighty-four thousand, nine hundred forty-nine".